topic Re: Indexer cluster from non clustered indexer in Deployment Architecture

Indexer cluster from non clustered indexer

noybin — Wed, 05 Jul 2017 19:08:05 GMT

Hello,

I have an instance with indexer and Search head in the same instance.

I was asked to create a cluster of indexers formed by the indexer I already have (replicating its data) and a new Indexer:

Is it possible to keep the indexer and search head in the same instance or do I need to separate the indexer from the Search Head?
Is it possible to replicate the historical data I have on the indexer into the new cluster member?
Is there an offcicial procedure on how to achieve this?

Thank you very much.
Regards.

Re: Indexer cluster from non clustered indexer

somesoni2 — Wed, 05 Jul 2017 19:26:23 GMT

Ans 1. You would need a separate VM for search head instance and a cluster master instance. See this for more details on machine requirement for indexer cluster. http://docs.splunk.com/Documentation/Splunk/6.5.1/Indexer/Systemrequirements#Machine_requirements

And 2 and 3. See this http://docs.splunk.com/Documentation/Splunk/6.5.1/Indexer/Migratenon-clusteredindexerstoaclusteredenvironment

Re: Indexer cluster from non clustered indexer

woodcock — Wed, 05 Jul 2017 22:49:58 GMT

1: Probably but NOBODY does this. If you "need" to cluster, then you need Indexer capacity of some sort. Your Indexer tier's collective quality/response is only as good as your WORST single Indexer. You are guaranteeing that you will always have 1 Indexer (your Search Head + Indexer combo) that is worse than all the others.

2: It is possible but not officially supported. The bucket format for clustered indexers is different than for non-clustered. But they can co-habitate fine (it is just that the older format will NEVER replicate; eventually it will age out and nobody will care/notice).

3: No. #1 is unwise and nobody does it (so why would anybody document it). #2 is documented as "unsupported" but unofficially Splunk will do it for "important clients" and some of us will do it if you are willing to take the risk (we ninjas like to live dangerously).

Re: Indexer cluster from non clustered indexer

noybin — Wed, 26 Jul 2017 21:23:14 GMT

Hi,

Thank you very much for your response.

I will not migrate the old data. It's the customer decision.

What would be better from the following?:

To keep that indexer for the old data only and create a cluster with 2 new indexers? (Is this possible?)
In this case I would have the SH consuming from one cluster (with 2 members) and a separate indexer.

Include this indexer as one of the members of the cluster and create a new indexer as the second member? (Is this possible?)
In this case the SH will be consuming only from the cluster (with 2 members).

Thank's again.
Regards.